AMS-02 Positrons from Decaying Wino in the Pure Gravity Mediation Model

Abstract

The AMS-02 collaboration has recently reported an excess of the cosmic-ray positron fraction, which turned out to be consistent with previous results reported by the PAMELA and Fermi-LAT collaborations. A decaying dark matter with the mass around 1 TeV can be responsible for the excess of the positron fraction when it is interpreted as a dark matter signal. Interestingly, the pure gravity mediation model provides such a dark matter, namely an almost pure neutral wino dark matter, when a tiny R-parity violation through $LL{E}^c$ interactions is introduced. We show that the decaying wino dark matter well reproduces the energy spectrum of the fraction with being consistent with constraints from cosmic-ray anti-proton and gamma-ray observations.

19 pages, 3 figures, version to appear in JHEP

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• Neutrino Mass and Dark Matter in light of recent AMS-02 results
• Dynamical Dark Matter and the Positron Excess in Light of AMS
• A Closer Look at Gaugino Masses in Pure Gravity Mediation Model/Minimal Split SUSY Model
• Peccei-Quinn Symmetry from Dynamical Supersymmetry Breaking
• Wino Dark Matter in light of the AMS-02 2015 Data
• Imprint of Multi-component Dark Matter on AMS-02
• Revisiting Multi-Component Dark Matter with New AMS-02 Data
• Systematic study of the uncertainties in fitting the cosmic positron data by AMS-02
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• Polonyi Inflation
• Constraining the co-genesis of Visible and Dark Matter with AMS-02 and Xenon-100
• Leptophilic Dark Matter and AMS-02 Cosmic-ray Positron Flux
• Mass of Decaying Wino from AMS-02 2014
• Cornering Compressed Gluino at the LHC
• Dark Matter in Split SUSY with Intermediate Higgses
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• Decaying WIMP dark matter for AMS-02 cosmic positron excess
• An Interpretation of the Cosmic Ray $e^{+}+e^{-}$ Spectrum from 10 GeV to 3 TeV Measured by CALET on the ISS
• Triplet Dark Matter from leptogenesis